Comments

This is a note to let you know that I have just added a patch titled
llc: Fix missing msg_namelen update in llc_ui_recvmsg()
to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
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From 43db3463d77387c239e0ac5646c3eaee79d34b0e Mon Sep 17 00:00:00 2001
From: Mathias Krause <minipli@googlemail.com>
Date: Sun, 7 Apr 2013 01:51:56 +0000
Subject: [PATCH] llc: Fix missing msg_namelen update in llc_ui_recvmsg()
commit c77a4b9cffb6215a15196ec499490d116dfad181 upstream.
For stream sockets the code misses to update the msg_namelen member
to 0 and therefore makes net/socket.c leak the local, uninitialized
sockaddr_storage variable to userland -- 128 bytes of kernel stack
memory. The msg_namelen update is also missing for datagram sockets
in case the socket is shutting down during receive.
Fix both issues by setting msg_namelen to 0 early. It will be
updated later if we're going to fill the msg_name member.
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Mathias Krause <minipli@googlemail.com>Signed-off-by: David S. Miller <davem@davemloft.net>Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
net/llc/af_llc.c | 2 ++
1 file changed, 2 insertions(+)
--
1.8.1.2